Associative ionization in collisions of electronically excited Na atoms with vibrationally excited Na2(v") molecules
Universität Kaiserslautern, Fachbereich Physik, Postfach 3049, 67653
2 University of Latvia, Institute of Atomic Physics and Spectroscopy, Raina bulv. 19, 1586 Riga, Latvia
Published online: 15 August 1999
We have studied the formation of ions in collisions of Na(3d,5s,4d) atoms with vibrationally excited Na molecules in their electronic ground state in a supersonic beam. The cross-section of the Na associative ionization is found to be about six times larger than that of the corresponding atomic reaction Na. Associative ionization in collisions of Na(3d) with Na is observed only with vibrationally excited Na2 molecules. The cross-section of this reaction increases only slightly with v" for low vibrational excitation, while a strong increase with v" is observed for . The latter observation suggests the opening of the channel leading to the formation of ions in the first electronically excited state for .
PACS: 34.50.Gb – Electronic excitation and ionization of molecules; intermediate molecular states (including lifetime, state mixing, etc.) / 34.50.Fa – Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999